moral righteousness is irrelevant to the fact that he is being persecuted for journalism.
I think the question is, when does the line between journalist and espionage intersect?
Does his state sponsored participation in election interference count as journalism? Did his misinformation campaign during the Catalan independence movement count as journalism? How about the attempt to bribe the Trump administration for the ambassador seat to Australia?
There's a reason every serious journalist that Assange utilized to launch wikileaks has not only abandoned the project, but has accused Assange of financial fraud, miss handling information, and endangering their sources.
I don't think Julian Assange is a journalist, I think he just likes being famous, and at one point journalism was a way to do that. I don't think he should be in jail for the rest of his life, but I also don't think he deserves Carte Blanche for everything he's done based on his prior "journalistic integrity".